Clamp for welding-machine attachments



H. W. KRANZ AND J. LUKES. CLAMP FOR WELMNG MACHINE ATTACHMENTS.

APPLICATION FILED MAY 24. 1920. I 1,416,839. Patented y 23, 1922.

4 SHEETS-SHEET I.

3 v I v anwnboz R i i i 2 H. W; KRANZ AND J. LUKES. CLAMP FOR wunme MACHINE ATTACHMENTS.

APPLICATION FILED MAY 24, 1920 Patented May 23 4 SHEETS SHEET 2.

H. w. KRANZAND 1. LUKES. CLAMP FOR WELDING MACHINE ATTACHMENTS. APPUCATION. FILED MAY 24, 1920. 1,416,839. atented May 23, 1922.

4 SHEETS-SHEET 3.

HHHH H W KRANZ AND J LUKES CLAMP FOR WELDING MACHINE ATTACHMENTS.

1,416,839. APPLICATION FILED MAY 24, 1920; Patented May 4 SHEETS-SHEET 4.

awuenboz HARRY V]. KEANE AND J LUZ OF OHIO.

Application filed ix lay 24, 1929. Serial No.

To all whom it may concern lle known that we. linear ll. linauz and dorm Lorine citizens of the United States, residing at Clevennd. in the county oi? Guyahoga and State of Ohio, have in vented acertain new and useful improvetachments of which the i ollowi a *full, clear, and exact description, reference being had to the accompanying drawings.

T his invention relates generally to electric welding machines employed inweloing together the ends of a rolled circular band or rim.

Heretoiore the circular band or rim has been placed upon the bed. of the welding machine and clamped thereto and this clamping operation has been manually performed, and likewise the releasing of the clamp has been manually accomplished and these manual operations not only require the services or. one or more operators but also require con siderable time in their accomplishment.

it is therefore with the object of eliminating the manual operations and the saving of time and labor that the present improvements have been devised, and the invention went in Clamps for lt eldingl/lachine Ate having these objects in view consists in the novel teatures of the various parts and in the manner o'l combining and operating the same. as will be more fully described hereinafter and. set forth in the appended claims.

In the drawings "forming a part of this specii'ication l. is a side elevation of a welding 'uchine embodying our improvements; 2 is a detail side view of one of the clamps and means for operating the same; Fig. 3 is an end view of the same;

,Fig. 4i an end view from the opposite side;

Fig. 5 is a top plan view; Fig. 6 is a view showing the clamp proper in detail.

As the welding machine proper and the l'iydraulicmeans connected therewith for operating certain portions of said welding ma chine iiorm no part of our invention, no reterence will be made thereto. In this type of? welding machine there is usually a fixed portion and a movable portion of the base and these portions we have indicated. at A and B, respectively, and attached to each portion in any suitable manner are the oppositely disposed castings 0 each having fluid operating pistons l) and E arranged therein said fluid operated pistons being either connected to or erssr canvas HYDRAULIC rnnssno coarser-i i, cLtav...

at-r new! 1- was "re TJEZENIE A'i'TAGHT/LENTS.

Patented orat on.

ope 'ating upon a vertically movable rack which meshes with a mutilated gear G journaled within the casting upon an axis G. said niiutilated gear having oneset of teeth. wh "-h the rack F and another set sh with the toothed edge iii H which works vertically up and down in the guide way H of the casting. The outer face of the reciprocating clamp H has a V-shaped recess H" cut therein and an aperture H in the apex thereof, and a ll-shaped block I having an opening I through which the pivot J passes is. arranged in the V-shaped recess of the clamp H and it will be noted that the edge of the central portion is curved on the arc of a circle as indicated at H and the block I is enlarged at its lower end and this enlarged portion is cut away on the same are as indicated at 1 thereby permitting a limited swinging movement of the block within the clamp H inasmuch as sufiicient clearance is provided to permit such movement, this clearance and movement being provided to permit the block I to firmly seat upon the rim in case any irregularities should be present. It will be understood that a re movable face K is attached to the shouldered face of the block I in any suitable manner. It will be noted that the teeth of the rack ll are cut at an oblique angle and likewise those of the clamp H thereby permitting mutilated gear to be arranged at an angle and bring the clamp in the proper position for engaging the rim. As before stated there are two castings C one on the movable and the other on the fixed portion of the welding machine base, and these castings and connected parts are duplicates of each other oppositely disposed and operating in unison, and in order to so operate them it is only necessary to apply fluid pressure to the proper side of the piston and all of the operations will be carried out, thereby completely eliminating the manual operations which have heretofore been a time consunr ing feature in the welding operation. When the rack F is moved upwardly by hydraulic pressure, clamp H is moved downwardly as previously described and any irregularity in the stock or base of the machine is compensated for by the tilting movement of the block in the clamp. The casting and all of the parts carried thereby are constructed and arranged in such a manner as to be able to withstand any and all strains placed thereon.

Having thus described. our invention, what we claim is:

1.. In a machine of the kind described, the combination with the base portions, of the castings connected thereto, a fluid operated rack arranged in each casting, gears meshing,- with said racks, and clamps operated by said gears all arranged as set forth.

2. In a device of? the kind described. a casting having a fluid operated rack arranged therein, a gear pivoted in said. casting and meshing with said rack, a clamp movable in said casting and having a portion meshing with said gear.

In a device of the kind. described, the crnnbination with a casting, oi? a rack movable therein, a gear carried by said casting and meshing with said rack, a clamp carried by the casting and movable with reference thereto, said clamp having a portion meshing with said gear, and a member pivotally connected to the clamp and capable oi? a limited vibratory movement with reference thereto.

41:. In a device of the kind described, the

combination with a clamp, ot a gear for reciprocating sald clamp, a fluid operated rack ior actuatlng sald gear and a support for carrying said clamp,gear, rack and actuating mechanism.

5. In a device of the kind described, a vcrtically movable clamp having a supplemen tai member pivotally connected thereto and having a vertical vibratory movement with reference thereto together with means for 'aising and lowering said clamp.

6. In a device of the kind described, the combination with a clamp, of means for actuating said clamp together with. means for 4 our signatures.

HARRY W. KRANZ. JOHN LUKES. 

